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<p>In this study, a diesel particulate filter (DPF) was coupled with a coating with different catalyst loadings to form two catalytic diesel particulate filters (CDPF), CDPF#1 (15&#xa0;g/ft<sup>3</sup>) and CDPF#2 (18&#xa0;g/ft<sup>3</sup>). Bench tests were carried out under various diesel engine operating conditions to evaluate their effects on engine performance. The research results show that the opaque smoke intensity is higher at 1200&#xa0;rpm, and the front-end opaque smoke intensity emission of CDPF#2 is higher, with a maximum value of 9.6. However, at 1600–3000&#xa0;rpm, since the opaque smoke intensity of the original engine is smaller, the opaque smoke intensity of the exhaust gas is less than 1 after passing through DPF, CDPF#1 and CDPF#2. After installing DOC + CDPF#1, CO emissions are reduced by 83%, NO<i>x</i> emissions are reduced by 39.6%, The exhaust back pressure is reduced by 9&#xa0;kPa compared to DPF. At 1200&#xa0;rpm and 100% load, the soot capture rate is higher than the oxidation rate, causing the back pressure to rise from 3–6&#xa0;kPa to 6–8&#xa0;kPa. After the endurance test, the back pressure of the DPF without catalyst coating increased by 28.6%, while the back pressure of the CDPF coated with 18&#xa0;g/ft<sup>3</sup> catalyst remained stable between 6 and 8&#xa0;kPa. The regeneration efficiency of DPF, CDPF#1, and CDPF#2 are 40%, 58.5%, and 55%, respectively.</p>

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Experimental study on external characteristics of diesel engine equipped with different after-treatment devices

  • 期刊论文

  • 发表日期：

    2025年8月7日

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  • Guangyuan Bao,
  • Wei Zhang,
  • Chao He,
  • Dongge Wang,
  • Jiaqiang Li

摘要

In this study, a diesel particulate filter (DPF) was coupled with a coating with different catalyst loadings to form two catalytic diesel particulate filters (CDPF), CDPF#1 (15 g/ft3) and CDPF#2 (18 g/ft3). Bench tests were carried out under various diesel engine operating conditions to evaluate their effects on engine performance. The research results show that the opaque smoke intensity is higher at 1200 rpm, and the front-end opaque smoke intensity emission of CDPF#2 is higher, with a maximum value of 9.6. However, at 1600–3000 rpm, since the opaque smoke intensity of the original engine is smaller, the opaque smoke intensity of the exhaust gas is less than 1 after passing through DPF, CDPF#1 and CDPF#2. After installing DOC + CDPF#1, CO emissions are reduced by 83%, NOx emissions are reduced by 39.6%, The exhaust back pressure is reduced by 9 kPa compared to DPF. At 1200 rpm and 100% load, the soot capture rate is higher than the oxidation rate, causing the back pressure to rise from 3–6 kPa to 6–8 kPa. After the endurance test, the back pressure of the DPF without catalyst coating increased by 28.6%, while the back pressure of the CDPF coated with 18 g/ft3 catalyst remained stable between 6 and 8 kPa. The regeneration efficiency of DPF, CDPF#1, and CDPF#2 are 40%, 58.5%, and 55%, respectively.